42 results about "Dioptric correction" patented technology

The invention provides a subjective optometry prediction method combining wavefront aberration and optical signals. According to the method, eyeball wavefront aberration data are measured through a wavefront sensor, cornea, crystal and retina biological parameters are obtained by combining multi-view-field scanning of a galvanometer system, and after high-credibility data points are screened, a gradient refractive index eyeball three-dimensional model is constructed by adopting an NURBS algorithm; using finite element analysis to optimize cornea stress distribution, iteratively correcting the model through a deformation energy function, and dynamically compensating eyeball motion errors based on eye movement tracking data; and generating a multi-field-angle visual chart image through ray tracing simulation, and predicting a subjective optometry result in combination with an image quality evaluation algorithm. According to the method, high-precision modeling, dynamic error suppression and intelligent simulation technologies are fused, the optometry prediction accuracy, the personalized adaptation degree and the dynamic scene adaptability are remarkably improved, and an efficient and reliable solution is provided for refraction correction.

The invention relates to the technical field of lenses, in particular to a film for vision correction and a lens, and the film for vision correction is deposited on the surface of a lens substrate and comprises a refractive index matching layer, a refraction compensation layer, an out-of-focus prevention and control layer, a blue light interference prevention layer and a super-hydrophobic wear-resistant layer which are sequentially arranged from bottom to top; the refraction compensation layer covers in a full-aperture mode and forms an optical area used for refraction correction in a central area, and the film thickness of the refraction compensation layer is decreased progressively from the center to the edge; the defocusing prevention and control layer covers the peripheral annular area of the optical area and comprises an annular transition belt and a main body defocusing area extending outwards from the outer edge of the annular transition belt; the out-of-focus prevention and control layer is composed of a ZrO2-epoxy resin compound; the inner film thickness of the annular transition zone is linearly increased from inside to outside, the concentration of the ZrO2 nanoparticles is induced to gradually change through a radial electric field, a refractive index radial gradient is formed, the concentration of the ZrO2 nanoparticles in the main body defocusing zone is constant, and peripheral defocusing is maintained through secondary increase of the film thickness.

The present disclosure relates to a computer-implemented method for determining a refractive correction in an optical system, such as an eye. This method involves the utilization of data representing a light wavefront that has passed through the optical system to compute a curvature map. The curvature map is then segmented into at least two clusters based on the variation between the curvature data points. For each cluster, the mean curvature of the light wavefront is calculated. Subsequently, the refractive correction corresponding to the mean curvature of the light wavefront in each cluster is computed. The final step involves selecting one of these computed refractive corrections as the definitive refractive correction for the entire optical system. This method allows for a quick and precise prescription determination for any type of optical correction.

The invention discloses a multi-focal near-to-eye display holographic optical element and a preparation method and device thereof. The element adopts a composite structure of a substrate, a multi-focal correction layer and a holographic recording layer, a holographic grating accurately matched with each optical partition of the correction layer is formed in the recording layer through a partition exposure technology, and multi-depth virtual image display and user refraction correction functions can be realized at the same time. The preparation device comprises a coherent light source, a beam splitter, a diffusion plate, a focal plane displacement system, a mask component and a master controller, and partition exposure is realized through cooperative control. The problem that traditional near-to-eye display cannot meet multi-focus display and refraction correction at the same time is solved, a user can clearly perceive fused multi-depth virtual information and a real environment without additionally wearing glasses, the visual comfort and experience are remarkably improved, and the method is suitable for AR / VR and other head-mounted display devices.

The present invention relates to the technical field of defocus lenses, and particularly to a myopia prevention and control lens with hybrid multi-focal microlenses; it includes a lens body, and the lens body successively includes an intermediate refractive correction area, a peripheral defocus area, and a peripheral lens area from the center outwards; the peripheral defocus area includes a plurality of microlens units, and the plurality of microlens units are arranged in an array to form the peripheral defocus area; each microlens unit includes a plurality of microlenses, and the plurality of microlenses are arranged in an array to form the microlens unit; each microlens unit is divided into n layers in a ring shape from the center microlens outwards, where the position of one microlens at the center of each microlens unit is the first layer, and the additional diopters of the microlenses in each layer of each microlens unit are equal; the additional diopters of the microlenses of each microlens unit from the first layer to the nth layer decrease or increase in sequence. The myopia control effect of the present invention is better, and the compliance of the wearer is improved.

The utility model discloses a myopia prevention and control lens capable of realizing eyesight fogging, which comprises a lens first refraction part and a lens second refraction part, the lens first refraction part is a lens center refraction correction visual area, the periphery of the lens first refraction part is the lens second refraction part, and the lens second refraction part is a lens center refraction correction visual area. The second refraction part of the lens is provided with a plurality of micro-lenses which are arranged according to the Fibonacci sequence and the Fermat spiral to form an atomization function area, so that the plurality of micro-lenses are arranged according to the Fibonacci sequence and the Fermat spiral, and the distance between any two micro-lenses is equal, so that the lens has excellent natural aesthetic characteristics; therefore, the coverage area of the micro lenses can be uniform and consistent in unit area, large use difference possibly brought by tiny optical deviation is avoided, and the problem that the effect of wearing out-of-focus glasses is relatively reduced possibly in the long-term use process of children in the vision growth period is ensured.

A method and associated instrument in which an optical system is switched from a first to a second refractive power states, to provide a first, and then a second refraction correction to an eye of a subject, the switching being carried on without interrupting a light beam coming from a target object and transmitted by the optical system to the eye of the subject. The switching is carried on in order to circumvent an intermediate refraction correction that is in between said first and second refraction corrections, or with a speed higher than a given limit.

The present invention relates to the field of lens technology, and in particular to a film and lens for vision correction. The film for vision correction is deposited on the surface of a lens substrate, comprising a refractive index matching layer, a refractive compensation layer, a defocus prevention and control layer, an anti-blue light interference layer and a super-hydrophobic wear-resistant layer arranged in sequence from bottom to top; the refractive compensation layer covers the entire aperture and forms an optical zone for refractive correction in the central area, and the film thickness of the refractive compensation layer decreases from the center to the edge; the defocus prevention and control layer covers an annular area around the optical zone, including an annular transition zone and a main defocus area extending outward from the outer edge of the annular transition zone; the defocus prevention and control layer is composed of a ZrO2-epoxy resin composite; the film thickness in the annular transition zone increases linearly from the inside to the outside, and a radial electric field is induced to gradually change the concentration of ZrO2 nanoparticles to form a radial gradient of refractive index, the concentration of ZrO2 nanoparticles in the main defocus area is constant, and the peripheral defocus is maintained by a secondary increase in film thickness.

The invention relates to an ophthalmic lens element (1) intended to be worn by a wearer, comprising: at least one prescription portion (2) having a first optical function configured to provide, when the lens element (1) is worn by the wearer, a refractive correction of the wearer's eye based on the wearer's prescription; and a plurality of lenslets (3), each lenslet (3) of said plurality of lenslets being configured to provide at least one second optical function different from the first optical function, wherein each lenslet (3) has a shape, a size and a position such that at least a portion of said lens element (1) has a modulation transfer function (MTF) whose values are configured such that the modulation transfer function of said lens element (1) is lower than or equal to 0.6 in a spatial frequency range comprised between 1 and 5 cycles per degree.

The invention relates to the technical field of refraction correction, in particular to a myopia control lens design method based on a heterogeneous scattering unit array, which comprises the following steps of: acquiring an eye axis length, a corneal curvature and a pupil diameter, calculating an incidence characteristic and a visual axis reference value, dividing functional areas according to an arrangement relationship between the incidence characteristic and a micro lens, and calculating a myopia control lens array; the method comprises the steps of building a coordinate index, analyzing structure parameter differences, reading parameters, calculating regulation and control characteristic values, and mapping array coordinates to generate a manufacturing instruction sequence. According to the structure arrangement and main visual axis relation, dividing functional sections, improving the matching degree of the area visual function, introducing a structure difference recognition and fine adjustment mechanism, improving the structure adjustment precision, and improving the manufacturing accuracy. The optical path control capability is enhanced, parameters are mapped into manufacturing instructions, the structure execution accuracy is ensured, the processing consistency is improved, closed-loop optimization from parameter acquisition, structure regulation and control to manufacturing instruction generation is integrally realized, the coupling of a visual intervention structure and functions is enhanced, and the stability and continuity of a correction effect are improved.

The application discloses a kind of corrective lens design equipment, storage medium and lens, it is related to medical equipment field, for solving the problem of existing refractive correction improves visual acuity or the effect of improving visual quality is poor.Refractive lens design equipment includes acquisition device, selection device and design device, acquisition device obtains the central refractive power of target individual eyeball, selection device finds out target refractive topography from refractive topography group, central refractive power is in the central refractive power range corresponding to target refractive topography, and refractive topography describes the retinal refractive power distribution of eyeball with corresponding central refractive power in preset field angle;Design device obtains refractive power distribution correction scheme in conjunction with target refractive topography, to obtain the corrective lens for target individual.The present application combines the peripheral defocus characteristics of human eye retina to design semi-personalized lens for individual, to achieve the purpose of improving visual acuity, improving myopia prevention and control effect or improving peripheral visual quality.

To provide an extended depth of focus (EDOF) that provides a cataract patient with continuous vision from distance to near with minimal halo and glare, and an intraocular lens (IOL) that achieves continuous vision.SOLUTION: To obtain continuous vision from a long distance to a short distance near 40-35cm by providing the extension of a focal depth. The spherical aberration of each zone of the anterior surface of the intraocular lens is optimized to minimize halo and glare. The fourth zone 60 degree segment design of the present invention provides a balanced energy distribution at large pupil diameters and makes the lens pupil independent of power distribution. The lens power and its extended depth of focus are independent of pupil size and lighting conditions. Furthermore, the change of zone of the intraocular lens can be used as a controllable switch to change the depth of focus according to the demand from far vision to near vision or from far vision to intermediate vision.SELECTED DRAWING: Figure 1

The utility model relates to a kind of glasses, specifically discloses a kind of moisturizing glasses, including glasses main body, the glasses main body includes frame and the lens assembly of being set in frame;The lens assembly includes flat light mirror and dioptric mirror, the dioptric mirror is detachable, for correcting eyesight;The moisturizing release buffer is equipped in the frame inside, for continuously releasing humid gas to eye portion;Frame both sides are connected with headband, adjusting buckle is equipped on the headband, for adjusting wearing tightness;Assembly block is inserted in the recess on the frame, reflective plate is fixed on the assembly block by screw;Limiting mechanism for limiting the assembly block is set on the frame. The moisturizing glasses provided in the scheme can realize eye moisturizing and dioptric correction simultaneously.

The invention relates to a refraction correction scheme generation method and system based on multi-modal data fusion. According to the method, an eye movement track and multi-modal data are collected, a fixation stability index is calculated, motion artifacts are separated in combination with a generative adversarial network to eliminate data distortion caused by eyeball micro movement, multi-modal data fusion is achieved based on dynamic weight distribution and space-time alignment, and finally a correction scheme is generated through mechanical simulation optimization. Therefore, the robustness of data acquisition, the accuracy of a fusion result and the safety of a correction scheme are improved, the problems of data noise interference, insufficient multi-modal collaboration and poor biomechanical suitability caused by insufficient vision fixation capability of a traditional method are solved, and the whole-course adaptive optimization from data acquisition to scheme generation is realized.

In the method according to the application, the optical system (2) switches from a first dioptric power state to a second dioptric power state to provide a first dioptric correction and a second dioptric correction to the eye (4) of the subject, said switching being performed without interrupting the light beam (6) coming from the target object (7) and transmitted by the optical system to the eye of the subject. Said switching is performed so as to bypass an intermediate dioptric correction between said first and second dioptric corrections, or at a speed higher than a given limit. The application also relates to an associated instrument (1).

The invention relates to a lens element (1) intended to be worn by a wearer, comprising at least one prescription portion (2) having a first optical function configured to provide a dioptric correction of an eye of the wearer when the lens element (1) is worn by said wearer based on a prescription of the wearer, and a plurality of lenslets (3), each lenslet (3) of said plurality of lenslets being configured to provide at least one second optical function which differs from the first optical function,wherein each lenslet (3) has a shape, a size and a position such that at least one portion of said lens element (1) has a modulation transfer function (MTF) whose values are configured so that the modulation transfer function of said lens element 1 over a range of spatial frequencies comprised between 1 and 5 cycles per degree are lower or equal to 0.6.

Intraocular implants and methods of making intraocular implants are provided. The intraocular implants can improve the vision of a patient, such as by increasing the depth of focus of an eye of a patient. In particular, the intraocular implants can include a mask having an annular portion with a relatively low visible light transmission surrounding a relatively high transmission central portion such as a clear lens or aperture. This construct is adapted to provide an annular mask with a small aperture for light to pass through to the retina to increase depth of focus. The intraocular implant may have an optical power for refractive correction. The intraocular implant may be implanted in any location along the optical pathway in the eye, e.g., as an implant in the anterior or posterior chamber.

An optical lens for vision correction adapted to correct a diopter value of N of an eye of a subject includes a vision correction area. The vision correction area includes an optical center, a first diopter correction portion, and a second diopter correction portion. The optical center is for aligning with a visual axis of the eye of the subject. The first diopter correction portion outwardly extends from the optical center and has a diopter value gradually decreasing from the optical center to a periphery of the first diopter correction portion. The optical center has a maximum diopter value ranging from N+3.5 D to N+9 D. The periphery of the first diopter correction portion has a diopter value of N. The second diopter correction portion surrounds and adjoins the first diopter correction portion, and has a diopter value constantly varying within a range from N−1.5 D to N+1 D.

The present disclosure concerns a testing device (500) comprising: a light-field projector display (100) sequentially emitting a plurality of light fields (101); a spatial light modulator (SLM) (3) controllable to modulate the light fields (101); projection optics (4) configured to project the modulated light fields (101) and form at least a virtual image (40) in a projection image plane (400); and wherein the SLM image pattern (61) is configured to add at least one refractive correction to said at least one virtual image (40). A human interface device (HID) (503) is configured to let a user select at least one of the virtual images (40) for which the user perceives as having the best image subjective quality input the refractive correction corresponding to the selected at least one of the virtual images (40) in a data storage unit (509). The present disclosure further concerns a computer-readable medium configured to perform a method for to assess the vision acuity of a user by using the testing device.

The invention provides an AI digital lens generation method and system based on a 3D eyeball digital model. The method comprises the following steps: acquiring original parameter data of a to-be-detected eyeball by utilizing multi-modal scanning; constructing a 3D eyeball digital model by using the original parameter data, inputting the 3D eyeball digital model into a pre-trained joint network, and extracting eyeball refraction parameters and an eight-order Zernike high-order aberration coefficient; inputting a collaborative design model of a generative adversarial network GAN and a multi-target non-sorting genetic algorithm NSGA-II by taking the eyeball refraction parameter and the high-order aberration coefficient as generative conditions, and determining an optimal lens free-form surface height map; and based on the optimal lens free-form surface height map, digital lens production is controlled through computer-aided manufacturing (CAM), and virtual try-on verification is performed in combination with an augmented reality (AR) technology. The technical problems that traditional refraction correction precision is insufficient and high-order aberration cannot be effectively compensated are fundamentally solved.

The invention discloses a lens based on augmented reality, belongs to the technical field of augmented reality near-to-eye display, and mainly solves the problems of heavy system, large assembly error and optical performance damage caused by split implementation of waveguide display and refraction correction functions in the prior art. According to the lens, the low-refractive-index layer, the high-refractive-index waveguide layer and the diffraction grating structure are directly constructed on the refractive lens, light rays are controlled to be transmitted in the waveguide layer in a total reflection mode, are diffracted by the grating and then penetrate through all the layers to enter human eyes, and the monolithic integration design is achieved. The lens is mainly used in augmented reality equipment, has a vision correction function while providing virtual image display, and is suitable for user groups needing to wear correction lenses.

The present invention proposes a subjective optometry prediction method that combines wavefront aberration with optical signals. This method measures the wavefront aberration data of the eyeball through a wavefront sensor, obtains the biological parameters of the cornea, lens, and retina through multi-field scanning with a galvanometer system, and after screening high-credibility data points, uses the NURBS algorithm to construct a three-dimensional model of the eyeball with a gradient refractive index; optimizes the corneal stress distribution using finite element analysis, it iteratively corrects the model through deformation energy functions, and dynamically compensates for eye movement errors based on eye tracking data; generates multi-field angle vision chart images through ray tracing simulation, and predicts subjective optometry results in combination with an image quality assessment algorithm. The present invention integrates high-precision modeling, dynamic error suppression, and intelligent simulation technologies to significantly improve the accuracy, personalized adaptability, and dynamic scene adaptability of optometry predictions, providing an efficient and reliable solution for refractive correction.

The utility model discloses a progressive multi-focus lens group, which comprises a lens body and a lens bracket for supporting the lens body, the lens bracket is provided with two lens frames, the progressive multi-focus lens group also comprises a single-focus lens inserted with the lens bracket, the lens bracket is provided with an annular groove, and the lens body is arranged in the annular groove. The single-focus glasses are inserted into the glasses frame, and the lens bodies are mounted on the glasses frame, so that the two lenses can be conveniently combined for use; when the single-focus glasses are not used, the single-focus glasses can slide upwards to be locked by the locking structure, so that the stability of the single-focus glasses can be ensured, and the use is more reliable; and the progressive multi-focus auxiliary lens with the same Add value can be suitable for all presbyopia people conforming to the value, so that the inconvenience that a progressive lens needs to be specially customized is avoided.

An ophthalmic device satisfying a prescription for at least one power correction for a wearer, a method for manufacturing the ophthalmic device, and a method for applying a semi-finished hybrid ophthalmic lens. The ophthalmic device includes at least one electro-active cell which includes a rear shell and a front shell defining a backside surface and an opposite front surface, the shells being provided with transparent electrodes and delimiting a sealed cavity. The rear shell derives from a semi-finished hybrid ophthalmic lens including a front mineral part having a first mineral face proximal to the front shell and a second mineral face opposite to the first mineral face, and a rear plastic part attached to the front mineral part.